Bitcoin Optech 427: channel-opening flaws and LN-GAP research
This issue discloses two denial-of-service flaws in Eclair's channel-opening process involving duplicate channel identifiers and limits on pending channels. They could exhaust memory. The newsletter states that versions through v0.14.0 were affected and that fixes shipped in July with v0.14.1.
LN-GAP explores complex, multi-round contracts inside Lightning channels. A committee attests whether messages were published on time, addressing an unresponsive counterparty. Although the committee does not custody funds, security still depends on an honest majority, so the design is not fully trustless.
Non-custodial designs can depend on external evidence. Payment security also includes resource limits and availability.